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Creating dataframe from a dictionary where entries have different lengths
...k]) for k, v in data.items()], axis=1)
Use pandas.DataFrame and itertools.zip_longest
For iterables of uneven length, zip_longest fills missing values with the fillvalue.
The zip generator needs to be unpacked, because the DataFrame constructor won't unpack it.
from itertools import zip_longest
...
Pandas: create two new columns in a dataframe with values calculated from a pre-existing column
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I'd just use zip:
In [1]: from pandas import *
In [2]: def calculate(x):
...: return x*2, x*3
...:
In [3]: df = DataFrame({'a': [1,2,3], 'b': [2,3,4]})
In [4]: df
Out[4]:
a b
0 1 2
1 2 3
2 3 4
In [5]: df["A1"], ...
Is there an easy way to attach source in Eclipse?
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Up until yesterday I was stuck painstakingly downloading source zips for tons of jars and attaching them manually for every project. Then a colleague turned me on to The Java Source Attacher. It does what eclipse should do - a right click context menu that says "Attach Java Source".
I...
Is there a quick way to delete a file from a Jar / war without having to extract the jar and recreat
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zip -d file.jar unwanted_file.txt
jar is just a zip file after all. Definitely much faster than uncompressing/recompressing.
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How to perform better document version control on Excel files and SQL schema files
...sions.
The same is true for .xlsx if you decompress them. .xlsx files are zipped up directories of XML files (See How to properly assemble a valid xlsx file from its internal sub-components?). Git will view them as binary unless decompressed. It is possible to unzip the .xlsx and track the changes ...
VC窗口刷新InvalidateRect和UpdateWindow - C/C++ - 清泛网 - 专注C/C++及内核技术
...TIMER消息一样被丢弃，但Windows总是在消息循环空的时候才把WM_PAINT放入其中。
无效区域的坐标并不附带在WM_PAINT消息的参数中，在程序中有其他方法可以获取。WM_PAINT消息只是通知程序有个区域需要更新而已，所以Windows也不会同...
Sorting an array of objects by property values
...by any field at will...
const homes=[{h_id:"3",city:"Dallas",state:"TX",zip:"75201",price:"162500"},{h_id:"4",city:"Bevery Hills",state:"CA",zip:"90210",price:"319250"},{h_id:"5",city:"New York",state:"NY",zip:"00010",price:"962500"}];
// Sort by price high to low
console.log(homes.sort(sort_...
构建高并发高可用的电商平台架构实践 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...放资源给其他进程执行，这样系统的吞吐量不高。
需要把业务进行逻辑的分段，采用异步非阻塞的方式，提高系统的吞吐量。
随着数据量和并发量的增加，读写分离不能满足系统并发性能的要求，需要对数据进行切分，包括...
Create nice column output in python
...... ]
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>>> widths = [max(map(len, col)) for col in zip(*rows)]
>>> for row in rows:
... print " ".join((val.ljust(width) for val, width in zip(row, widths)))
...
a b c d
aaaaaaaaaa b c d
a bbbbbbbbbb c d
...
Using .NET, how can you find the mime type of a file based on the file signature not the extension
...nk that it is reliable. E.g. '*.docx' file is determined as 'application/x-zip-compressed'.
– Monsignor
Feb 11 '11 at 4:20
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